Time filter

Source Type

Nirmal Kumar J.I.,Institute of Science and Technology for Advanced Studies and Research | Barot M.,Institute of Science and Technology for Advanced Studies and Research | Kumar R.N.,Institute of Science and Technology for Advanced Studies and Research
Indian Journal of Geo-Marine Sciences | Year: 2017

It was observed that seaweeds were not found continuously during study period but some species were observed only for short periods whereas other species occurred for two to three months. A total of 70 species has been recorded with highest number of Rhodophyta (51.42%) species than Phaeophyta (25.71%) and Chlorophyta (22.85%). From the recorded groups of seaweeds, carbohydrate and chlorophyll contents were higher in Chlorophyta while protein was maximum in Phaeophyta and Rhodophyta, respectively. On the other hand, phenol, flavonoids and carotenoids were recorded more in members of Phaeophyta. © 2017, National Institute of Science Communication and Information Resources (NISCAIR). All rights reserved.

Bhattacharya T.,Institute of Science and Technology for Advanced Studies and Research | Banerjee D.K.,Jawaharlal Nehru University
Environmental Monitoring and Assessment | Year: 2010

This study assessed the heavy metal (Cr, Mn, Ni, Cu, Zn, and Pb) uptake and its effect on biochemical parameters in Paspalum distichum, a wetland plant. Sludge collected from Bhalswa waste dump, New Delhi, was used as heavy metal source and dosed in different proportions viz. 20%, 40%, 60%, and 80% to the garden soil. The plants accumulated metals mostly in belowground organs. The metal accumulation followed the order: Cr>Mn>Cu>Zn>Ni>Pb. The range of heavy metal concentration in tissue of belowground organs after 180 days of growth was 1,778.65-4,288.01 ppm Cr, 828.11-1,360 ppm Mn, 236.52-330.07 ppm Ni, 155.79-282.35 ppm Cu, 27.05-91.16 ppm Zn, and 27.09-50.87 ppm Pb. The biochemical parameters viz. chlorophyll and protein contents and peroxidase (POD) activity exhibited no considerable adverse effect indicating the plants' tolerance towards heavy metals. The high POD activity and synthesis of new protein bands at high sludge-dosed plants were also in support of this fact. © Springer Science + Business Media B.V. 2009.

Bhattacharya T.,Institute of Science and Technology for Advanced Studies and Research | Tiwari K.K.,Sophisticated Instrumentation Center for Applied Research and Testing
Journal of Environmental Biology | Year: 2010

The present investigation was undertaken to assess the biodegradation of phenol by native bacteria strains isolated from coke oven processing wastewater. The strains were designated ESDSPB1, ESDSPB2 and ESDSPB3 and examined for colony morphology Gram stain characters and biochemical tests. Phenol degrading performance of all the strains was evaluated initially One of the strains namely ESDSPB2 was found to be highly effective for the removal of phenol, which was used as sole carbon and energy source. From an initial concentration of 200 mg ť it degraded to 79.84±1.23mg I'. In turn the effect of temperature (20 to 45°C), pH (5-10) and glucose concentration (0,0.25 and 0.5%) on the rate of phenol degradation by that particular strain was investigated. Observations revealed that the rate of phenol biodégradation was significantly affected by pH, temperature of incubation and glucose concentration. The optimal conditions for phenol removal were found to be pH of 7 (84.63% removal), temperature, 30°C (76.69% removal) and 0.25% supplemented glucose level (97.88% removal). The main significance of the study is the utilization of native bacterial strains from the waste water itself having potential of bioremediation. © Triveni Enterprises, Lucknow (India).

Patel A.N.,Champion Indusries | Patel M.M.,Sardar Patel University | Dighe A.,Institute of Science and Technology for Advanced Studies and Research
Progress in Organic Coatings | Year: 2012

Fatty acid based self-crosslinking polyurethane urea (PUU) anionomers can find potential applications in coatings field due to enhanced chemical resistance properties. To optimize their performance in coatings, the molecular features that influence the microphase morphology and dynamic mechanical (DM) behavior of polymer films must be understood and exploited. In this work, comprehensive materials characterization of model PUU anionomers films with oxidative-crosslinking microstructure is addressed. For this, linoleic fatty acid based precursor (LPE) was included in polymer backbone which provides reactive sites for autooxidative polymerization. Three series of compositions were prepared with urea content of 8.4%, 13.2% and 18.1% where within each series LPE content has been increasing in same proportion. Different experimental techniques like FTIR, DSC, DMA and mechanical testing were utilized to study the effect of compositional variables on the extent of phase segregation, domain structure and mechanical properties of fully cured polymer samples. The extent soft segment (SS) oxidative crosslinking had marked effect on the microphase morphology and DM properties of materials of lowest urea content. Significant phase mixing was observed with evolvement of single heterogenous phase in the sample with highest LPE content. Samples with 13.2% urea shows less sensitivity toward increased SS crosslinking in their microphase morphology change. Their mechanical and DM properties were observed to be dominated by interlocked hard domains. With higher urea content, such kind of hard segment cohesion results due to greater strength of bidenate H-bonding among urea linkages. While samples with highest % urea, were clearly found to be well microphase separated compared to other two series with highest HS interconnectivity and have marginal effect of extent of SS crosslinking on microphase separation. This study gives an insight about effect of extent of complex oxidative crosslinking on the microphase separation and DM behavior of segmented PUU anionomers based films with different urea content which is useful in designing such materials in coating system with specific surface structure and function. © 2012 Elsevier B.V. All rights reserved.

Patel A.,Champion Industries | Patel C.,Institute of Science and Technology for Advanced Studies and Research | Patel M.G.,Champion Industries | Patel M.,Sardar Patel University | Dighe A.,Institute of Science and Technology for Advanced Studies and Research
Progress in Organic Coatings | Year: 2010

The higher molecular weight fatty acid modified polyurethane-urea dispersions (PUDs) were prepared with effective utilization of fatty acid and ionic emulsifier. The PUDs were prepared using oligomer of linoleic fatty acid, dimethylol propionic acid (DMPA), linear polyester diol, isophorone diisocyanate (IPDI), triethylamine (TEA) and ethylenediamine (EDA) by prepolymer mixing method. Resultant PUDs had so-called controlled branched polymer structures. To incorporate fatty acid residues in the backbone of the polyurethane two types of oligomers were used which were synthesized by esterifying linoleic acid and phthalic anhydride (PA) with different monomers having different hydroxyl functionality i.e. trimethylol propane (TMP), pentaerythritol and neopentyl glycol (NPG). The oligomers were mixed with linear polyester diol in different proportions and used as polyol part in prepolymer for PUDs. Various compositional variations such as type of oligomer, content of oligomer and ionic emulsifier were studied for stability and compatibility with water. The PUDs were also examined by FTIR, AFM, GPC, particle size analyzer, viscometer, TGA, DMA and tensile tester to analyze structures and properties. Chemical, water and corrosion resistances of the dried films were also evaluated to study the effect of oligomer content in modified PUDs. These properties are found to be significantly affected by the content and type of oligomer as well as ionic content in the polymer. © 2009 Elsevier B.V. All rights reserved.

Patel M.R.,Sardar Patel University | Patel R.B.,Sardar Patel University | Parikh J.R.,Sardar Patel University | Patel B.G.,Institute of Science and Technology for Advanced Studies and Research
Journal of Liquid Chromatography and Related Technologies | Year: 2011

A new, simple, and rapid high-performance thin-layer chromatographic method was developed and validated for quantitative determination of Isotretinoin. Isotretinoin was chromatographed on silica gel 60F254 TLC plate using toluene - methanol (9.0+1.0v/v) as the mobile phase. Isotretinoin was quantified by densitometric analysis at 340nm. The method was found to give compact spots for the drug (RF=0.430.01). The linear regression analysis data for the calibration plots showed good linear relationship with r2=0.9995 in the concentration range 100-500ng/spot. The method was validated for precision, recovery, repeatability, and robustness as per the International Conference on Harmonization guidelines. The minimum detectable amount was found to be 13.72ng/spot, whereas the limit of quantitation was found to be 41.58ng/spot. Statistical analysis of the data showed that the method is precise, accurate, reproducible, and selective for the analysis of Isotretinoin. The method was successfully employed for the estimation of equilibrium solubility, quantification of Isotretinoin as a bulk drug, in commercially available preparation and in-house micro-emulsion based gel formulations. Copyright © Taylor & Francis Group, LLC.

Aggarwal A.,Gujarat Technological University | Gandhi S.,Gujarat University | Chaubey N.,Institute of Science and Technology for Advanced Studies and Research | Jani K.A.,Ganpat University
International Conference on Advanced Computing and Communication Technologies, ACCT | Year: 2014

Mobile Ad Hoc Networks (MANETs) are collections of mobile nodes that can communicate with one another using multihop wireless links. MANETs are often deployed in the environments, where there is no fixed infrastructure and centralized management. The nodes of mobile ad hoc networks are susceptible to compromise. In such a scenario, designing an efficient, trustworthy and secure routing protocol has been a major challenge over the last many years. In this paper, we propose a Trust Based Secure On Demand Routing Protocol called 'TSDRP' for MANETs. Ad hoc On-demand Distance Vector (AODV) routing protocol has been modified to implement TSDRP for making it secure to thwart attacks like Blackhole attack and DoS attack. To evaluate the performances, we have considered Packet Delivery Fraction (PDF), Average Throughput (AT) and Normalized Routing Load (NRL). © 2014 IEEE.

PubMed | Institute of Science and Technology for Advanced Studies and Research and Anand Agricultural University
Type: | Journal: Genomics data | Year: 2015

Ruminants are known to harbour a vast and diverse microbial community that functions in utilizing the fibrous and starchy feedstuffs. The microbial fermentation of fibrous and starchy feed is carried out by different groups of microbiota, which function in synergistic mechanism. The exploration of the shift in carbohydrate utilizing microbial community with the change in diet will reveal the efficient role of that group of microbial community in particular carbohydrate utilization. The present study explains the shifts in microbial enzymes for carbohydrate utilization with the change in the feed proportions and its correlation with the microbial community abundance at that particular treatment. The sequencing data of the present study is submitted to NCBI SRA with experiment accession IDs (ERX162128, ERX162129, ERX162130, ERX162131, ERX162139, ERX162134, ERX162140, ERX162141, ERX197218, ERX197219, ERX197220, ERX197221, ERX162158, ERX162159, ERX162160, ERX162161, ERX162176, ERX162164, ERX162165, ERX162166, ERX162167, ERX162168, ERX162169, ERX162177).

De B.K.,Institute of Science and Technology for Advanced Studies and Research | Patel J.D.,Institute of Science and Technology for Advanced Studies and Research
European Journal of Lipid Science and Technology | Year: 2011

The applicability of calcium hydroxide (lime) in the neutralization of rice bran oil (RBO) was investigated. Crude RBO samples of three different free fatty acids (FFAs) (3.5-8.4wt%) were degummed, dewaxed, bleached, and neutralized with lime and deodorized. The oils obtained thus were characterized by determining the color, peroxide value (PV), content of unsaponifiable matter (UM), and FFA. Conventionally practiced caustic soda neutralization (at 80-90°C) of FFA has in the present investigation been replaced by a high temperature (150-210°C) low pressure (2-4mm Hg) reaction with lime. It was observed that neutralization with Ca(OH) 2 at high temperature (210°C) and under low pressure (2-4mm Hg pressure) may substantially reduce the FFA content (0.8wt%, after 2h). The deodorized oil was found to be of acceptable color, PV, and content of UM and FFA. Neutralization of oil was also carried out by using NaHCO 3 and Na 2CO 3, nonconventional alkalies for neutralization, and the results were compared with NaOH and Ca(OH) 2. Overall recovery of oil in Ca(OH) 2 refining process (88.5±0.6wt%, for Sample 1 containing 8.4%-wt FFA) was found to be more than other competitive processes studied. © 2011 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

PubMed | Institute of Science and Technology for Advanced Studies and Research and Natubhai V Patel College
Type: Journal Article | Journal: Brazilian journal of microbiology : [publication of the Brazilian Society for Microbiology] | Year: 2015

Penicillum janthinellum SDX7 was isolated from aged petroleum hydrocarbon-affected soil at the site of Anand, Gujarat, India, and was tested for different pH, temperature, agitation and concentrations for optimal growth of the isolate that was capable of degrading upto 95%, 63% and 58% of 1%, 3% and 5% kerosene, respectively, after a period of 16 days, at optimal growth conditions of pH 6.0, 30 C and 180 rpm agitation. The GC/MS chromatograms revealed that then-alkane fractions are easily degraded; however, the rate might be lower for branched alkanes, n-alkylaromatics, cyclic alkanes and polynuclear aromatics. The test doses caused a concentration-dependent depletion of carbohydrates of P. janthinellum SDX7 by 3% to 80%, proteins by 4% to 81% and amino acids by 8% to 95% upto 16 days of treatment. The optimal concentration of 3% kerosene resulted in the least reduction of the metabolites of P. janthinellum such as carbohydrates, proteins and amino acids with optimal growth compared to 5% and 1% (v/v) kerosene doses on the 12(th) and 16(th) day of exposure. Phenols were found to be mounted by 43% to 66% at lower and higher concentrations during the experimental period. Fungal isolate P. janthinellum SDX7 was also tested for growth on various xenobiotic compounds.

Loading Institute of Science and Technology for Advanced Studies and Research collaborators
Loading Institute of Science and Technology for Advanced Studies and Research collaborators